Method of making antique surfaces



Patented July 17, 1928.

UNITED STATES PATENT OFFICE.

RAYMOND J'. GREENE,

COMPANY,

0F SEBBING,l OHIO, .ASSIGNOB TO THE GEI CLAY FOBIING 0F SEBBING, OHIO, A CORPORATION 0F OHIO.

IETHOD'OF MAKING ANTIQUE SURACES.

Application tiled .lai-eh21, 1927. Serial Zlio.r 176,972.

This invention relates to 'ornamenting surfaces of clay and the like, and more'particularl to a novel method'of ornamenting the sur aces of back walls and other parts of radiant gas heaters to produce an antique appearance.

The object of the improvement is to pro'- vide an ornamentalsurface for clay and the like in vwhich oxides are applied to the surface and when burned eat into the .surface of the clay, giving an antique appearance to the article thus ornamented.

, An embodiment of the invention is illustrated -in the accompanying drawing, in which Fivure 1 is a front elevation of a back the surface ot' a back wall Wall for a radiant gas heater showing the surface thereof ornamented by the improved method, and

Fig. Q, a section taken substantially on the line 2 2, of Fig. 1.

Similar numerals refer to similar parts throughout the drawing. Y

' In carrying out the invention to ornament for a radiant, as shown generally at 1, the back wall is molded or formed -to the general outline desired, being composed of a mixture of fire clay and magnesium silicate, talc or the like. p

A slip, ot' about the consistency of ordinary paint, containing an oxide such as antimony, cryolite, boric acid or other material which will eat into the magnesium silicate or talc when tired, is then applied to the surface to be ornamented with a sponge or brush.

This slip may be applied in irregular patches of any desired design to produce the necessary appearance and when the back wall is fired the oxide in the slip combined with the magnesium silicate or talc in the lire clay will eat into the surface, giving an antique appearance as indicated in the draw- -ing.

It1 itis desired to color the portions of the surface which are not attacked by this oxide,

- article, and

a slip 'of paint containing a chrome, oxide may also e applied to the surface. This chrome oxide will not eat into the surface but will merely color the same when tired.

lVhile the invention is described and illustrated as applied to the back walls of radiant gas heaters, it should be understood that ornamentation is applicable to the radiants themselves or to any other surface of clay vor the like.

Although one design of ornamentation is illustrated in the drawing, it will be seen that the oxide'slip may be applied in any number of different designs to produce the 4desired etlect when. the article is fired.

I claim:

1. The ornamentinv process which consists in forming an article ofl clay mixed with magnesium silicate and the like, applying a slip containin an oxide to the surface of the ring the article whereby the oxide combines with the magnesium silicate to eat into the'surface of the clay article.

2. The ornamentin process which consists in forming an artic e of cla mixed with magnesium silicate and the li e, applying a slip containing an oxide of antimony and the like to the surface of the article, and firing the article whereby the antimony oxide combines with the magnesium silicate to eat into the surface of the clay article.

3. The ornamenting process which consists in forming an article of clay mixed with magnesium silicate and the like, applying a slip containing an oxide of antimony and the like to the surface of the article, applying a slip containing chrome oxide to the surface, and'iring the article whereby the antimony oxide 'combines with the magnesium silicate to eat into the surface of the clay article and the chrome oxide colors the uneaten portion of the clay article.

In testimonythat I claim the above, I have hereunto subscribed my name.

RAYMOND J. GREENE.

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